Added input validation for storage (#2348)

[xiangyan99]

• Added input validation for storage

• updates

• update test

• fix tests

• update

• update

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Pre-merge Checklist

• Required for All PRs
  • Read contribution guidelines
  • PR title clearly describes the change
  • Commit history is clean with descriptive messages (cleanup guide)
  • Added comprehensive tests for new/modified functionality
  • Created a changelog entry if the change falls among the following: new feature, bug fix, UI/UX update, breaking change, or updated dependencies. Follow the changelog entry guide
• For MCP tool changes:
  • One tool per PR: This PR adds or modifies only one MCP tool for faster review cycles
  • Updated servers/Azure.Mcp.Server/README.md and/or servers/Fabric.Mcp.Server/README.md documentation
  • Validate README.md changes running the script ./eng/scripts/Process-PackageReadMe.ps1. See Package README
  • For new or modified tool descriptions, ran ToolDescriptionEvaluator and obtained a score of 0.4 or more and a top 3 ranking for all related test prompts
  • For tools with new names, including new tools or renamed tools, update consolidated-tools.json
  • For renamed tools, follow the Tool Rename Checklist and tag the PR with the breaking-change label
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• Extra steps for Azure MCP Server tool changes:
  • Updated command list in servers/Azure.Mcp.Server/docs/azmcp-commands.md
  • Ran ./eng/scripts/Update-AzCommandsMetadata.ps1 to update tool metadata in azmcp-commands.md (required for CI)
  • Updated test prompts in servers/Azure.Mcp.Server/docs/e2eTestPrompts.md
  • 👉 For Community (non-Microsoft team member) PRs:
    • Security review: Reviewed code for security vulnerabilities, malicious code, or suspicious activities before running tests (crypto mining, spam, data exfiltration, etc.)
    • Manual tests run: added comment /azp run mcp - pullrequest - live to run Live Test Pipeline

[Copilot]

Pull request overview

This PR adds storage account name input validation in StorageService to prevent invalid/malicious account values from being used when constructing Storage service endpoints, along with unit tests and a changelog entry.

Changes:

• Introduces ValidateStorageAccountName and calls it from blob/table endpoint construction.
• Adds unit tests covering valid/invalid account name scenarios (including SSRF-style payloads).
• Adds a changelog entry for the fix.

Reviewed changes

Copilot reviewed 3 out of 3 changed files in this pull request and generated 2 comments.

File	Description
tools/Azure.Mcp.Tools.Storage/src/Services/StorageService.cs	Adds account name validation and applies it during endpoint URI creation.
tools/Azure.Mcp.Tools.Storage/tests/Azure.Mcp.Tools.Storage.UnitTests/Services/StorageServiceValidateAccountNameTests.cs	New unit tests for the account-name validation behavior.
servers/Azure.Mcp.Server/changelog-entries/1775486642509.yaml	Documents the storage account name validation change as a bug fix.